Method oe reversing the chisels oe moutisiwo-machines



p per part of the collar G, see Fig. 3.

'UNITED STATES PATEN T OFFICE.

i RR MOSES MARSHALL, OF LOWELL, MASSACHUSETTS, ASSIGNOR TO RIOHD. BALL AND GHAS. H. BALLARD, OF WORCESTER, MASSACHUSETTS.

METHOD 0F REVERSING THE CHISELS 0F MORTISING-MACI-IINES. E

Specification of Letters Patent N o. 17,183, dated April 28, 1857.

being pressed against the camshaped part of the collar G, by the spring M, fastened to the collar K. The pawl J, has projection shown in Fig. 4, which projection c, when the collar is moved in the direction` indicated by the arrow acts on the pin e, in the bolt H, and forces the bolt back and holds it until the pawl J, moves the collar G, so as to carry the score past the end of th then releases the bolt, so that the spring N, fastened on the rear of the front B, presses the end of the o lt against the collar G, and into the score when it comes opposite the bolt, so as to thechisel F, in a proper position after it is reversed.

To all 'whom t may concern:

Be it known that I, MOSES MARSHALL, of Lowell, in the county of Middlesex and tate of Massachusetts, have invented cer tain new and useful Improvements in Mortising-Machines; and I do hereby declare that the same are described and represented .in the following specifications and draw- 1n s.

Ilo enable others skilled in the art to make and use my improvements I will proceed to describe the construction and operation, referring to the drawings in which the same letters indicate like parts in each of the figures.

Figure l, is a plan or top view, such parts only of the machlnebeing represented as as to turn the collar K, by the ch This chain passes around the collar pulley, P, and its ends are connected Q, which vibrates on the stud to the R, in

lease, reverse and lock the mortising chisel as often as it is desirable to do so.

In the accompanying drawings the base or bottom of the machine is shown at A, with the front B, and sides C, C, firmly The stand D, is fastened to the B, and perforated for the spindle E, to turn in, which is iitted to itand has a socket at its lower end for the chisel F. The spindle E, has a collar G, on it above the stand D, made in the form shown in Fig.

lars K, and G, and the lever U is raised the chain 0,1s traversed in the opposite direction and the collar remains stationary, while the collar K, is turned back and the projection c, on the pawl J passes outside of the pin e, in the bolt H, and stands prepared to act again required, to aid in reversing the chisel as above described. j

ith my improvements the operator can reverse the chisel as often as he pleases, while the machine is in motion with his foot and use his hands to manage the stu' he is mortising. l

I believe I have described and represented my improvements in mortising machines, so as to enable any person skilled in the art the stand I, fastened onto the stand D, for that purpose. The collar G, extends above the line 1, y, and i made cam-shaped as shown in Fig. 4L, wlth two notches b, for

The collar K, is tted to turn freely on the spindle E, above the collar G, and is provided with a flange which surrounds the up- This K, has a projection L, on it provided a pin on which the pawl J, vibrates collar with 2 misav to make and use them, and I Will now state direction substantially as described for the What I desire to secure by Letters Patent to purposes set forth.

2. I claim the slotted lever Q, chain O,

Wit.

and lever U or their equivalent, so con- 15 structed and arranged as to turn the collar I claim- K, and reverse the chisel as described.

5 1. rIhe projection o, on the pavvl J, so constructed and arranged as to press back the bolt I-I, When moved 1n one direction and re- MosEs MARSHALL. l

lease the collar G, so that it may be turned by the pavvl J, to reverse the chisel; and Witnesses:

10 also that it, the projection o, Will pass out- J. HENRY I-IILL,

side of the pin e, when moved in the other APPLETON DADMAN. 

